I'm not sure if this question has been asked before, but here we go. As everyone knows, in Star Wars: Episode VI – Return of the Jedi (1983), Princess Leia, disguised as the bounty hunter Boushh infiltrates Jabba's palace under the pretense of collecting the bounty on Chewbacca but her real plan was to release Han Solo. In order to do it, later that night, Leia enters the throne room when Jabba and the court seemed to be asleep, and after she moved silently among the shadows, she made her way to the trophy alcove. The only noise she made is when she accidentally knocked the Nar Shaddaa wind chimes with her helmet. Then, she releases Han from his carbonite imprisonment and just as the two were about to escape, they are caught by Jabba and his thugs that show up behind a curtain of Jabba's private elevator.
Is there a Canon/Legend explanation of how Jabba knew that Leia was Boushh and had planned to release Han that night?
I have researched some possible explanations to answer my question as follows:
- Was the chime a sensor?
- Was there an alarm from the freezing panel?
- Did Jabba anticipate it from a tip off one of his subordinates like Boba Fett?
- Was just an out-of-universe reason, but I have found not a legit answer.